Huawei HCSP-Field-Data Center Facility V1.0 H20-923_V1.0 Exam Questions

Answer : B

Huawei facility O&M methods emphasize using monitored operating data to locate inefficiencies before they become faults. Airflow-related cooling inefficiency commonly appears as hot spots at rack inlets, elevated return air temperature fluctuations, abnormal fan speed increases, or uneven temperature distribution across aisles. By trending rack inlet temperature sensors alongside cooling unit supply/return temperatures and fan speed or airflow commands, operations teams can distinguish between insufficient cooling capacity and poor airflow organization. Recirculation (hot air returning to rack inlets) often raises localized inlet temperatures without a proportional rise in room average temperature, while bypass (cold air short-circuiting back to returns) reduces cooling effectiveness and can drive fans to higher speeds unnecessarily. Data-driven checks support targeted corrective actions such as sealing cable openings, adjusting floor tile placement, restoring containment integrity, balancing airflow, or optimizing setpoints. This approach improves thermal stability, prevents overcooling, reduces energy waste, and aligns with Huawei's emphasis on integrated monitoring and closed-loop optimization for reliable, efficient operation.

Answer : C

Huawei room-level air conditioning products are commonly identified by the series name plus a model suffix that indicates the cooling medium and airflow form factor. An in-room chilled water unit uses a chilled-water coil as the primary heat-exchange component and relies on the building's chilled-water system (chiller/plant) rather than an onboard refrigeration compressor for cooling generation. ''Horizontal air supply'' describes the discharge direction: the unit supplies conditioned air laterally into the room or into a specific airflow organization (such as cold-aisle delivery), supporting predictable airflow paths and stable return air conditions. Within the provided options, FusionCol5000-A050H is the model that matches both identifiers: it belongs to Huawei's room cooling product line and the model code indicates an in-room configuration with chilled-water capability and horizontal air supply orientation. The other options belong to different series or represent configurations typically associated with other deployment forms (such as different placement, airflow direction, or system architecture). Therefore, the correct selection is FusionCol5000-A050H.

Answer : D

For onsite replacement of a UPS power module, Huawei's maintenance logic follows a safe ''isolate remove insert re-enable'' sequence controlled by the module ready switch. During removal, the ready switch must be rotated to the OFF state first so the module is logically isolated from operation and will not participate in power conversion. After isolation, the four fixing screws are removed and a short waiting period is required to allow internal energy in capacitors to discharge before the module is pulled out. This matches statement . During installation, the ready switch must remain OFF before insertion to prevent unintended startup or arcing during connector engagement. The module is placed in position, inserted slowly and evenly until fully seated, then secured with the four screws. Only after mechanical fastening and full seating is confirmed should the ready switch be rotated to the ON state to allow the system to recognize and bring the module online. This matches statement .

Answer : A

This statement is true. In split DX/precision cooling refrigerant systems, the ''gas pipe'' typically refers to the suction line returning refrigerant vapor (and entrained compressor oil) from the indoor evaporator to the outdoor unit/compressor. When the outdoor unit is higher than the indoor unit, the suction line includes a vertical riser. Oil naturally tends to settle and flow downward under gravity, so without proper piping measures, oil may accumulate in low points or fail to be carried upward consistently, leading to poor oil return. Insufficient oil return can cause compressor lubrication issues, abnormal noise, overheating, reduced efficiency, and long-term reliability risks. Installing oil traps at the bottom of the riser and then every 5--6 meters of vertical lift helps collect oil and allows it to be periodically swept upward by refrigerant velocity, maintaining stable oil circulation. This requirement is especially important in data center cooling because continuous operation and high availability demand reliable compressor lubrication and stable refrigerant flow under varying load conditions.

Answer : A

In Huawei data center power distribution design, the SPD (Surge Protective Device) provides overvoltage surge protection for sensitive loads by diverting transient energy to ground through internal protection components. The SPD status indicator is used for O&M judgment of protection availability. When the indicator is green, it indicates the SPD protection components are within normal working condition and the surge protection path remains effective. When the indicator turns red, it typically means the SPD's internal protection element has degraded or disconnected (end-of-life or failure after cumulative surges), and the device can no longer provide the rated protection level. In this condition, the distribution system is left exposed to surge risk, especially during thunderstorms, switching operations, or upstream disturbances. Therefore, Huawei O&M practice treats a red SPD indicator as a replacement trigger, requiring immediate corrective action: confirm alarm/status, ensure safe isolation following electrical safety procedures, and replace the SPD module to restore protection and maintain power system reliability.

Answer : A

The correct sequence prioritizes electrical safety first, then mechanical disassembly. You must confirm the batteries are not discharging (Step 1) to avoid working under load. Next, the cabinet must be placed into a safe powered-down state by switching off the battery circuit breaker and long-pressing the POWER ON/OFF button to power off the cabinet (Step 6). Only after the cabinet is safely powered down should you open up the working area by removing the front covers of the faulty module and adjacent modules (Step 3). Then you turn off the ready switch on the battery management module (Step 2) to prevent the system from re-enabling the module unexpectedly during maintenance. After that, you loosen the securing bolts and pull out the battery management module about 10 cm (Step 5) to create operating space and ensure isolation for subsequent operations. With the cabinet safely stopped, you can remove the cables and copper bars connected to the faulty module (Step 7), and finally remove the baffle plate and pull out the faulty battery module (Step 4).

Answer : A

In Huawei smart module monitoring architecture, the UIM20A expansion module is traditionally used to increase device ports so cabinets can connect multiple intelligent components and sensors (for example, door status and environmental sensors). Huawei also provides the intelligent rPDU PDU2000M, whose main control module includes communications and DI interfaces designed to directly cabinet-level intelligent devices for centralized monitoring and management. In Huawei's solution description for rPDU-monitoring networking, the PDU2000M is positioned to replace the expansion-module role, meaning that in applicable scenarios, cabinets can connect monitoring devices through the PDU2000M without deploying an additional UIM20A expansion module. This supports practical connections such as T/H sensors, smart U space managers, and door status/door-access related signals through the PDU2000M interfaces, and then these devices are managed/bound in the controller's smart module view. Huawei O&M guidance also emphasizes avoiding duplicate connections (do not connect the same device to both UIM20A and PDU2000M), aligning with the replacement concept. (Scribd)